SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. The service offers both immediate online purchases and domain rentals, including rental agreements that provide a priority right to buy the domain at a price fixed in the contract. Purchases transfer domain administration rights, while rentals allow customers to set their own name servers. Rental terms can extend up to 50 months.

Customers can browse the full domain inventory, download a list in Excel, or use advanced search tools to find names by keyword and other parameters. Listings show purchase and monthly rental prices, along with details such as domain age and a rating based on search-related indicators. For selected domains, visitors can submit questions or propose a price; assistance and online chat are available through the Help section. SITE.su is designed for individuals and businesses seeking a memorable web address through either acquisition or a more flexible rental arrangement.